Details

Autor(en) / Beteiligte

• Chen, Guijing
• Yang, Yuanyuan
• Kang, Dongdong
• Qin, Qingqing
• Jin, Jinbo
• Shao, Huiju
• Qin, Shuhao

Titel

Enhanced performances of chlorinated polyvinyl chloride (CPVC) ultrafiltration membranes by styrene-maleic anhydride copolymer

Ist Teil von

• Separation and purification technology, 2021-03, Vol.258, p.118043, Article 118043

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2021

Quelle

ScienceDirect

Beschreibungen/Notizen

• •The interaction between SMA and CPVC improves the compatibility.•The role of anhydride in phase separation has been confirmed for the first time.•Porosity, wettability, water flux and BSA rejection were substantially improved.•The irreversible contamination rate of the blended ultrafiltration membrane is reduced to 5% for BSA protein. To enhance the performances of the CPVC ultrafiltration membranes, herein, styrene-maleic anhydride copolymer (SMA), an amphiphilic copolymer, was used to blend with CPVC to adjust the microstructures of membranes. The pure CPVC and SMA/CPVC composite ultrafiltration membranes were prepared by a non-solvent-induced phase inversion process. It has been proved that SMA and CPVC were partially compatible according to the rheological behavior of casting solution, DSC, FT-IR and SEM. SMA changed the phase separation mechanism and the pore structure of the composite membranes, and significantly increased the porosity. According to the results of ATR-FTIR, EDS and XPS analysis, intact anhydride groups existed on the surface of the composite membranes, which enhanced the permeability of membranes. The SMA/CPVC composite ultrafiltration membranes with 2 wt% SMA exhibited superior pure water flux (459.85 L/m2·h), protein rejection (97.2%) and permeability flux (140.69 L/m2·h) compared with the neat CPVC membrane (248.97 L/m2·h, 74.5%, 74.14 L/m2·h, respectively) at 0.1 MPa. Moreover, the flux recovery ratio increased from 55.32% to 92.68% and irreversible fouling index decreased from 42.51% to 5.00%. Importantly, the antifouling mechanism of the SMA/CPVC ultrafiltration membrane was discussed in detail.